Abstract: In the electrodeposited abrasive wheel 20 of the abrasive tool according to the present invention, plural mound parts 21, which are upheaved at the central domain of base metal 19 in almost columnar shape, are arranged mostly in the shape of lattice. An abrasive grain layer 22 is formed on a base metal 19, and plural ultra abrasive grains 14 are adhered only to each mound parts 21 by electrodeposited metal phase 25, and referred as the small abrasive-grain-layer parts 24, respectively. Ultra abrasive grains are laid out at corner R part 21a and top 21b of the mound parts 21 at the small abrasive-grain-layer parts 24. Ultra abrasive grains at each small abrasive-grain-layer parts are set as 11-500 pieces, and the rate which ultra abrasive grains occupy to the whole area of abrasive grain layer accounted by plane projection is set as 20%-80% of the range.

Abstract: A method of oxygen-smelting copper sulfide concentrate to obtain white metal, nearly white metal matte or blister copper by removing most of the Fe in the copper sulfide concentrate into the slag as well as removing part or most of the S therein as SO2 wherein oxygen-smelting is carried out to produce; slag in which a weight ratio of CaO to (SiO2+CaO) is 0.3 to 0.6 and a weight ratio of Fe to (FeOx+SiO2+CaO) is 0.2 to 0.5, and white metal, nearly white metal matte or blister copper, by adding SiO2 material and CaO material to the copper sulfide concentrate as flux.

Abstract: The present invention relates to a coated cemented carbide cutting tool member, which includes:

Abstract: A state and amount of charge indication device includes a braille indicator indicating characters in braille, a key unit for selecting information to be indicated, a charge control circuit, which controls the charging of a rechargeable battery and which is used to detect the state of charge. An A/D converter is provided for measuring a charging voltage of the rechargeable battery and a central processing unit controls, based on operations by the key unit, the braille indicator. The braille indicator is used to indicate states of charge, such as “in process of charging”, “completion of charging”, and “rechargeable battery error”, or the result of detection by the A/D converter, such as “fully charged”, “half charged”, or “remaining charge insufficient”.

Abstract: A vapor deposited material for FPD protective film comprises a polycrystalline body, sintered body, or single crystal having a surface covered with a fluoride layer. A manufacturing device for FPD protective film comprises: a film formation section for forming a film body on one side of a substrate, and a layer formation section for forming a fluoride layer on a surface of said film body; wherein said layer formation section comprises: a layer formation chamber for housing a substrate on which said film body is formed, a gas supply mechanism for forming a fluoride layer on the surface of said film body by supplying a fluoridation agent towards said substrate in said layer formation chamber, and a substrate heating section provided in said layer formation chamber for heating said substrate.

Abstract: A resilient pneumatic annular sealing bladder is coupled for fluid communication to a first pressurized pneumatic fluid to define a first pneumatic zone and is attached to a first surface of the wafer stop plate adjacent the retaining ring interior cylindrical surface to receive the wafer and to support the wafer at a peripheral edge. The resilient pneumatic annular sealing bladder defines a second pneumatic zone radially interior to the first pneumatic zone and extends between the first surface of the wafer stop plate and the wafer when the wafer is attached to the polishing head during a polishing operation and is coupled for fluid communication to a second pressurized pneumatic fluid. The wafer attachment stop plate is operative during non polishing periods to prevent the wafer from flexing excessively from an applied vacuum force used to hold the wafer to the polishing head during wafer loading and unloading operations.

Abstract: An antenna is provided to improve the gain and to eliminate various negative effects caused by a surrounding environment in which the antenna is mounted, such as the effects caused by neighboring metal plates and the like, while providing an antenna structure to facilitate its assembly into various communication devices. The antenna emitting radio waves at a center frequency has an antenna main body and a grounding line section connected to the ground-side of the coaxial cable for supplying power to the antenna main body. The grounding line section starts from a reference point and extends in a loop so as to surround the antenna main body, and portions of the conductor line are severed so as to provide a first end terminal and a second end terminal so that the length of the conductor line from the reference point to the first end terminal corresponds to one quarter of a wavelength of the center frequency or its integral multiple.

Abstract: A mobile station of a two-frequency simplex radio communication system, in which communication between a base station and each mobile station is performed in such a manner that the base station continuously transmits packet data whereas each mobile station transmits burst data. The mobile station includes a radio wave propagation path condition detector for detecting the condition of a radio wave propagation path used for communication, and a communication control circuit which, when it is determined based on the condition of the radio wave propagation path detected by the radio wave propagation path condition detector, that transmission or reception timing cannot be obtained within a predetermined period of time, adaptively selects a transmission mode and notifies the base station of the selected transmission mode so as to receive data which is transmitted from the base station after the notification.

Abstract: An antenna of a compact size enables to raise the inductance value of the resonance section and produce high gain. The antenna is constructed by connecting resonance sections and in series, in which each antenna element has an inductance section and a capacitance section connected electrically in parallel, and each inductance section has a conductor shaped in a square shape to circle the respective coil axes, and the opening sections formed at respective ends of the coil sections are contained in respective planes that are oriented at an angle to the coil axes.

Abstract: A communication system and a communication method arranged to obtain a diversity effect in mobile communication, to reduce the influence of multipath interference, fading or the like, to perform comparatively simple information communication such as message communication with improved reliability, and to achieve effective utilization of frequencies. A plurality of base stations having receivers are provided around an urban area within base station zones. The base stations repeatedly transmit the same message data. Receiving repeaters are provided in the urban area and small or medium suburban zones. Each receiving repeater relays a signal from a small mobile terminal via an Internet network if the output level of the mobile terminal is so low that direct transmission to one of the base stations is impossible. A 25 kHz frequency band is divided into four narrower bands of 6.25 kHz in one of the embodiments.

Abstract: A luminescent substance contains silicon and nitrogen as major components and has an amorphous structure. The silicon content of the luminescent substance is greater than the stoichiometric silicon content of Si3N4, and the luminous intensity of the luminescent substance has a maximum at approximately 2.2 eV. The luminescent substance has a high luminous efficiency and a short luminous decay lifetime. A light-emitting device includes this luminescent substance and a substrate. The luminescent substance can be readily formed on the substrate by a chemical vapor deposition process.

Abstract: The present invention provides a wafer polishing apparatus provided with a platen on the surface of which a polishing pad is affixed, and a wafer holding head for allowing one face of a wafer to contact the polishing pad by holding the wafer to be polished, the wafer being polished by a relative motion between the wafer holding head and the platen, wherein a dress ring is provided with an abrasive grain layer at the lower part at the outside of the wafer holding head so as to be rotatable while being in contact with the surface of the polishing pad.

Abstract: The present invention discloses a double-layer structured low-resistance and low-reflectivity transparent conductive film, comprising a lower high-reflectivity conductive layer containing a fine metal powder in a silica-based matrix and a silica-based low-reflectivity layer, suitable for imparting electromagnetic shielding property and anti-dazzling property to a CRT.

Abstract: A valve seat made of an Fe-based sintered alloy excellent in wear resistance and having a reduced counterpart valve attack property is disclosed, which comprises a base comprising 15-40% by weight of Cu, 0.3-12% by weight of Ni and 0.0005-3.0% by weight of C, and further comprising 0.1-10% by weight of Co and 0.1-10% by weight of Cr when necessary, with the balance being Fe and inevitable impurities, the base having a structure which comprises an Fe-based alloy phase 1 composed of Fe as a main component combined by a Cu-based alloy phase 2 composed of Cu as a main component, wherein hard particles phase 3 having MHV of 500-1700 is dispersed in the base. The Fe-based alloy phase 1 is an Fe alloy phase which comprises Ni, Cu and C with Fe having more than 50% by weight, while the Cu-based alloy phase 2 is a Cu alloy phase which comprises Ni, Fe and C with Cu having more than 50% by weight.

Abstract: Disclosed is a high speed-perforating apparatus 1 comprising a rotor 17 into and through which a cylindrical rotary shaft 11 is integrally inserted, a stator 18 disposed around the outer periphery of the rotor 17 and a core bit 13 which is directly connected to the head end portion of the rotary shaft. A bit 15 having an outer diameter of up to 40 mm and a cutting edge thickness of less than 2 mm is used for the core bit 13. Perforation is carried out by the core bit 13 which is rotated at a high speed of 4000 rpm or more by a direct motor 2 comprising the rotor 17 and the stator 18. A perforating time can be greatly shortened by rotating the core bit at high speed.

Abstract: A borate single crystal which can stably perform light wavelength conversion with high efficiency down to the ultraviolet region is represented by the chemical formula (A2O).(B2O3)x, and is an orthorhombic crystal belonging to the P212121 space group, wherein A includes two elements selected from the group consisting of Li, Na, K, Rb, and Cs, and 1.5<x<2.5.

Abstract: A method for producing a setter for defatting and/or firing, which can produce the setter without using any mold, and which can minimize generation of gas in the firing step of a process for producing the setter. The method enables setting of porosity of the setter to be relatively easily changed, and ensures a predetermined mechanical strength even with the porosity increased over 50%. The setter for defatting and/or firing has pores with an average diameter of 5-1000 &mgr;m and porosity in the range of 70-25%. The setter is formed of a porous body having a three-dimensional network structure having a flat surface. A porous sheet is preferably laminated on the surface of the porous body having a three-dimensional network structure, the porous sheet having pores, smaller than the pores of the structure body, with an average diameter of not more than 50 &mgr;m and having porosity in the range of 70-25%.

Abstract: A simple and inexpensive method and apparatus for producing crystalline silicon comprising the steps of melting silicon in a mold, then cooling the bottom of the mold is cooled to create a positive temperature gradient from the bottom of the mold upward, thereby causing the molten silicon to crystallize from the inner bottom of the mold upward so that the solid-liquid phase boundary, separating the crystallized silicon from the molten silicon, moves upward as the molten silicon crystallizes. As the silicon crystallizes, an inert gas is blown onto the surface of the molten silicon from a position above the surface of the molten silicon, thereby vibrating the surface of the molten silicon in such a manner that cavities are formed in the surface of the molten silicon.

Abstract: An internal gear oil pump made of Al alloys having less mutual damage property and superior wear resistance is provided. The internal gear oil pump has a casing with a gear compartment, a drive gear, and a driven gear, all of which are the structural members of the internal gear oil pump. The casing is constituted of an Al-alloy casting. The drive gear and the driven gear are constituted of a hot plastic working material of Al—Si alloy powder. The hot plastic working material is constituted of an Al—Si alloy having a structure in which unit crystal phases are dispersed in a base matrix by 10 to 40 area percent. by the structural observation with an optical microscope, the unit. crystal phases being harder than the base matrix. The base matrix is constituted of an Al—Si alloy which contains, on weight basis, 10% to 18% Si, 4% to 8% Fe, 1% to 3% Ni, 1% to 3% Cr, and the balance being Al and incidental impurities.

Abstract: The abrasive particle layer of resin bonded abrasive tool is constructed by resin binder phase consisting of heat hardening resin, for example, phenol resin etc. and super abrasive particle of diamond (or CBN etc.) distributed in this resin binder phase. The wear resistant filler consisting of SiC, for example, as hard filler and hollow glass and metal coated amorphous carbon is distributed in resin binder phase. The amorphous carbon is made to spherical shape and metal coating layer consisting of Cu, for example, as the metal having high thermal conductivity, is set on a surface of this amorphous carbon.